Pls could someone help thank you!! 3) Complete the sentences below about breathing: (6)
During inhalation the chest cavity changes shape and size. The contract which causes the rib cage to expand and pushes out the sternum (chest/breastbone). The will contract and will change shape from a concave or dome shape to a flattened shape. The pressure inside the chest cavity will be and therefore allows air to be sucked into the lungs. The air we breathe in is high in and but low in .

"griffith's experiment discovering the "transforming principle" in pneumococcus bacteria. griffith's experiment, reported in 1928 by frederick griffith, was the first experiment suggesting that bacteria are capable of transferring genetic information through a process known as transformation." - griffith's experiment.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

characteristics of hydrocarbons